#part2 .container .downloads .qr-area {
  position: relative;
  display: inline-block;
  *zoom: 1;
}

#part2 .container .downloads a:hover .qr-area .qr-tip {
  top: 20px;
  z-index: 10000000;
  -ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=100%)';
  -moz-opacity: 1;
  opacity: 1;
  
}
#part2 .container .downloads a .qr-area .qr-tip {
  position: absolute;
  z-index: -1;
  width: 130px;
  left: -55px;
  top: 0px;
  -ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=0%)';
  -moz-opacity: 0;
  opacity: 0;
  -moz-transition: all 0.3s;
  /* Firefox 4 */
  -webkit-transition: all 0.3s;
  /* Safari 和 Chrome */
  -o-transition: all 0.3s;
  /* Opera */
  transition: all 0.3s;
}
#part2 .container .downloads .qr-area .qr-tip img {
  width: 100%;
}